Information

Rigged Monopoly Sets

Starting in 1941, an increasing number of British Airmen found themselves as
the involuntary guests of the Third Reich, and the Crown was casting about
for ways and means to facilitate their escape...
Now obviously, one of the most helpful aids to that end is a useful and
accurate map, one showing not only where stuff was, but also showing the
locations of 'safe houses' where a POW on-the-lam could go for food and
shelter.
Paper maps had some real drawbacks -- they make a lot of noise when you open
and fold them, they wear out rapidly, and if they get wet, they turn into
mush.
Someone in MI-5 got the idea of printing escape maps on silk. It's durable,
can be scrunched-up into tiny wads, and unfolded as many times as needed,
and makes no noise whatsoever.
At that time, there was only one manufacturer in Great Britain that had
perfected the technology of printing on silk, and that was John Waddington,
Ltd. When approached by the government, the firm was only too happy to do
its bit for the war effort.
By pure coincidence, Waddington was also the U.K. Licensee for the popular
American board game, Monopoly. As it happened, 'games and pastimes' was a
category of item qualified for insertion into 'CARE packages', dispatched by
the International Red Cross to prisoners of war.
Under the strictest of secrecy, in a securely guarded and inaccessible old
workshop on the grounds of Waddington's, a group of sworn-to-secrecy
employees began mass-producing escape maps, keyed to each region of Germany
or Italy where Allied POW camps were regional system). When processed,
these maps could be folded into such tiny dots that they would actually fit
inside a Monopoly playing piece.
As long as they were at it, the clever workmen at Waddington's also managed
to add:
1. A playing token, containing a small magnetic compass
2. A two-part metal file that could easily be screwed together
3. Useful amounts of genuine high-denomination German, Italian, and French
currency, hidden within the piles of Monopoly money!
British and American air crews were advised, before taking off on their
first mission, how to identify a 'rigged' Monopoly set -- by means of a tiny
red dot, one cleverly rigged to look like an ordinary printing glitch,
located in the corner of the Free Parking square.
Of the estimated 35,000 Allied POWS who successfully escaped, an estimated
one-third were aided in their flight by the rigged Monopoly sets. Everyone
who did so was sworn to secrecy indefinitely, since the British Government
might want to use this highly successful ruse in still another, future war.
The story wasn't de-classified until 2007, when the surviving craftsmen from
Waddington's, as well as the firm itself, were finally honoured in a public
ceremony.
It's always nice when you can play that 'Get Out of Jail' Free' card!

Other Sources

Confirmation of the above, with a minor correction or two, can be found at: snopes.com: War Games and especially the sources cited.